Immediate permission request won't work if there has been some pending requests after configuration change

[zourb]

Reproduce procedure in sample project:

1. Add some immediate permission request in onCreate method of the MainActivity

   compositeDisposable.add(rxPermissions.requestEach(permission.READ_EXTERNAL_STORAGE, permission.WRITE_EXTERNAL_STORAGE, permission.SEND_SMS)
               .subscribe(new Consumer<Permission>() {
                   @Override
                   public void accept(Permission permission) throws Exception {
                   }
               }));

2. Click the button for CAMERA permission request
3. Rotate the phone after the permission dialog appearing
4. Then subsequent READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE requests won't trigger the permission dialog

[zourb]

The main point described above is: immediate permission request if there has been some pending requests after configuration change will result the empty permissions and results arrays which should be treated as a cancellation in the onRequestPermissionsResult callback.

/**
     * Callback for the result from requesting permissions. This method
     * is invoked for every call on {@link #requestPermissions(String[], int)}.
     * <p>
     * <strong>Note:</strong> It is possible that the permissions request interaction
     * with the user is interrupted. In this case you will receive empty permissions
     * and results arrays which should be treated as a cancellation.
     * </p>
     *
     * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}.
     * @param permissions The requested permissions. Never null.
     * @param grantResults The grant results for the corresponding permissions
     *     which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED}
     *     or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null.
     *
     * @see #requestPermissions(String[], int)
     */
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {
        /* callback - do nothing */
    }

thus, the permission entry of mSubjects in RxPermissionsFragment won't be removed.

[zourb]

The working demo: https://github.com/zourb/RxPermissions